External Pressure Stiffner Ring

[leon_har_dt]

Dear All,
i hope you are doing Ok,
one constructive and code question.
Can be a stiffner ring be attached by welding above a groove shell joint? (as mention in the image)


I read UG-30, and it doesn't mention or doesn't restrict to do it
Why to do it? I'm validating a design of a HX with a reducer cone. for 1-8 the ring has to be situated within a calculated distance.

I'll appreciate any answer

Thanks!

L.

 

[Trestala]

It is not advisable. You can just increase the conical thickness or apply a thicker knuckle transition.
Are you applying PWHT on the equipment and what is the material?